How do I go about installing a 3-way dimmer switch in my home?

To install a 3-way dimmer switch in your home, first turn off the power to the circuit at the breaker box. Remove the existing switch and identify the common wire. Connect the common wire to the common terminal on the dimmer switch. Connect the other two wires to the remaining terminals on the dimmer switch. Secure the switch in place and turn the power back on to test the dimmer.